The present disclosure is related to an integrity protection method and device. In the method, a first BEARER parameter value is obtained based on at least one of the following: a LCID corresponding to data transmitted in the sidelink communication, an access communication standard adopted by the sidelink communication, a BEARER parameter value allocated for the sidelink communication, or a preset BEARER parameter value. A bit length of the LCID corresponding to the transmitted data is greater than a bit length of the first BEARER parameter value. Based on the first BEARER parameter value, a MAC-I or an XMAC-I for the sidelink communication is calculated.
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2. The integrity protection method according to claim 1, wherein the first BEARER parameter value is obtained in the following manner: truncating N lowest bit values or N highest bit values of the LCID corresponding to the transmitted data to generate the first BEARER parameter value.
This invention relates to integrity protection in wireless communication systems, specifically for ensuring data integrity in transmissions between a user device and a network. The problem addressed is the need for efficient and reliable integrity verification of transmitted data, particularly in scenarios where data corruption or tampering could occur. The method involves generating an integrity protection parameter, referred to as the BEARER parameter, which is derived from a Logical Channel Identifier (LCID) associated with the transmitted data. The BEARER parameter is generated by truncating either the N lowest bit values or the N highest bit values of the LCID. This truncation process ensures that the BEARER parameter is a compact yet unique identifier that can be used to verify the integrity of the transmitted data. The method may also involve additional steps such as encoding the BEARER parameter and transmitting it alongside the data to enable the receiving device to perform integrity checks. The truncation of the LCID ensures that the BEARER parameter is derived in a deterministic and reversible manner, allowing for efficient verification without requiring extensive computational resources. This approach is particularly useful in wireless communication systems where bandwidth and processing power are limited, and reliable data integrity is critical.
3. The integrity protection method according to claim 2, wherein N is equal to an amount of bits of the first BEARER parameter value.
The invention relates to a method for protecting the integrity of data transmitted over a communication network, specifically in systems where data is divided into segments or blocks for transmission. The method addresses the problem of ensuring data integrity during transmission, particularly in scenarios where data is fragmented or processed in segments, such as in wireless communication systems or data storage applications. The method involves generating an integrity protection value for a first parameter, referred to as the BEARER parameter, which is used to identify or configure a communication channel or data path. The integrity protection value is derived by applying a cryptographic hash function or a similar integrity-checking algorithm to the BEARER parameter. The number of bits used in the integrity protection value, denoted as N, is dynamically determined based on the bit length of the BEARER parameter itself. This ensures that the integrity protection value is appropriately sized to match the complexity or sensitivity of the BEARER parameter, providing a balanced level of security without unnecessary computational overhead. The method may also include transmitting the integrity protection value alongside the BEARER parameter to a receiving device, which can then verify the integrity of the received data by recomputing the integrity protection value and comparing it to the transmitted value. This approach helps detect errors or tampering during transmission, ensuring reliable communication. The method is particularly useful in systems where the BEARER parameter is critical for establishing or maintaining a secure communication session.
4. The integrity protection method according to claim 3, wherein N is equal to 5.
11. The integrity protection device according to claim 10, wherein the first BEARER parameter value is obtained in the following manner: truncating N lowest bit values or N highest bit values of the LCID corresponding to the transmitted data to generate the first BEARER parameter value.
This invention relates to integrity protection in wireless communication systems, specifically for ensuring data integrity in transmissions between a user device and a network. The problem addressed is the need for efficient and reliable integrity verification of transmitted data to prevent tampering or corruption during communication. The integrity protection device includes a parameter generator that derives a first BEARER parameter value from a Logical Channel Identifier (LCID) associated with the transmitted data. The LCID is a unique identifier for the logical channel carrying the data. The first BEARER parameter value is generated by truncating either the N lowest bit values or the N highest bit values of the LCID. This truncation process simplifies the parameter extraction while maintaining sufficient uniqueness to support integrity checks. The device may also include a second BEARER parameter generator that derives a second parameter from a different source, such as a sequence number or a timestamp, to further enhance integrity verification. The integrity protection device compares the derived parameters with expected values to detect any inconsistencies, ensuring the transmitted data has not been altered. This method improves security and reliability in wireless communications by providing a lightweight yet effective integrity verification mechanism.
12. The integrity protection device according to claim 11, wherein N is equal to an amount of bits of the first BEARER parameter value.
The invention relates to a system for protecting the integrity of data transmitted over a communication network, particularly in scenarios where data is divided into segments or blocks for transmission. The problem addressed is ensuring that transmitted data remains unaltered and detectable if tampered with, especially when data is segmented into multiple parts. The system involves generating integrity protection codes for data segments using a cryptographic hash function, where the hash function is applied to a combination of the data segment and a BEARER parameter value. The BEARER parameter is a configurable value that can be adjusted to enhance security or adapt to different transmission conditions. The invention includes a method for generating these integrity protection codes, where the number of bits (N) used in the BEARER parameter value is dynamically set based on the bit length of the first BEARER parameter value. This ensures that the integrity protection mechanism is scalable and adaptable to different data sizes and transmission requirements. The system also includes a verification process to check the integrity of received data by recomputing the integrity protection codes and comparing them with the received codes. The invention is applicable in secure communication protocols, data transmission systems, and network security applications where data integrity is critical.
13. The integrity protection device according to claim 12, wherein N is equal to 5.
The invention relates to an integrity protection device designed to enhance the security of data transmission in communication systems. The device addresses the problem of unauthorized tampering or corruption of data during transmission by implementing a robust integrity verification mechanism. The system includes a transmitter and a receiver, each equipped with processing units to generate and verify integrity protection codes. The transmitter processes input data to produce a protected data stream, incorporating redundancy or error-checking codes to detect any alterations. The receiver then analyzes the received data stream to verify its integrity, ensuring that the data has not been tampered with during transmission. The device is particularly useful in applications where data integrity is critical, such as financial transactions, secure communications, or industrial control systems. The invention specifies that the number of integrity protection codes (N) is set to 5, optimizing the balance between computational overhead and security strength. This configuration ensures a high level of protection while maintaining efficient processing. The device can be integrated into various communication protocols or hardware systems to provide reliable data integrity verification.
14. The device according to claim 10, wherein when the device is the sender, the processor is configured to execute the computer programs to encapsulate the calculated MAC-I into a Packet Data Convergence Protocol (PDCP) header.
This invention relates to wireless communication systems, specifically to a device that enhances security in data transmission by generating and processing a message authentication code (MAC-I) for integrity protection. The device includes a processor configured to execute computer programs to calculate a MAC-I based on a security key and other input parameters. When acting as a sender, the device encapsulates the calculated MAC-I into a Packet Data Convergence Protocol (PDCP) header, ensuring data integrity during transmission. The PDCP header, which is part of the protocol stack in wireless networks, carries control information and is used to verify the authenticity and integrity of transmitted data packets. By embedding the MAC-I in the PDCP header, the device ensures that any tampering with the data can be detected at the receiving end. The invention improves security in wireless communications by integrating MAC-I generation and encapsulation into the PDCP layer, reducing the risk of unauthorized modifications to transmitted data. This approach is particularly useful in scenarios where secure and reliable data transmission is critical, such as in mobile networks and IoT applications. The device may also include additional features, such as error detection and correction mechanisms, to further enhance data integrity.
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March 29, 2021
May 7, 2024
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